Cleveland Indians starting pitcher Zach McAllister reacts after giving up a three-run home run to Toronto Blue Jays' Edwin Encarnacion, not shown, during the first inning of a baseball game, Saturday, July 2, 2016, in Toronto.

The club placed McAllister on the disabled list on Thursday with right hip discomfort. The Indians also optioned Mike Clevinger to Triple-A Columbus.

Austin Adams and Joe Colon are the latest additions to the Tribe's relief corps, which went nearly unused for a couple of weeks before being thrown out of whack last weekend in Toronto.

McAllister said the injury flared up over the weekend.

"I'm better off nipping it in the bud right now than letting it linger," he said.

McAllister allowed seven runs over 1 1/3 innings in his two most recent appearances, the first a spot start on a makeshift bullpen day on Saturday at Rogers Centre. He surrendered four runs in one-third of a frame against the Tigers in mop-up duty on Wednesday afternoon.

Overall, his ERA stands at 5.40, as the right-hander has given up 28 hits and 15 walks in 26 2/3 innings this season.

"With the All-Star break coming," said manager Terry Francona, "we can use that to our advantage. Let him rest up for a couple days, get him some side days, because we need to get him back to pitching the way he can. He's important in our bullpen and that's become a little bit inconsistent, so we can use this to our advantage."

Clevinger recorded two scoreless innings of relief in Wednesday's loss to Detroit. Francona said earlier this week that Clevinger would ultimately return to Columbus' starting rotation, though he indicated that the rookie could contribute to the Tribe's bullpen later this season.

The Indians needed only 21 innings from their bullpen during the first 13 affairs of their 14-game winning streak. The last victory, however, required 13 frames alone from the relievers plus five innings from Trevor Bauer, which prompted a bullpen day the following afternoon. The ramifications from the weekend of heavy usage included the club's decision to designate for assignment both Joba Chamberlain and Tom Gorzelanny on Monday.

Adams pitched in seven games for the Indians in late May and early June. He logged a 2.35 ERA, with 12 strikeouts in 7 2/3 innings. For Columbus, he has posted a 4.18 ERA across 28 innings.

Colon served a 50-game suspension at the start of the season for a second positive test for a drug of abuse. The Indians selected the righty in the 12th round of the 2009 amateur draft. After he returned to the Clippers' roster, he compiled a 0.59 ERA in 15 1/3 innings, as he limited the opposition to one earned run on four hits.